Francisco E. answered • 04/26/14
Tutor
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Francisco; Civil Engineering, Math., Science, Spanish, Computers.
Original equation is: (7-x)^0.5 + x = 1; to solve the equation, we can write it: (7-x)^0.5 = 1-x
make square on both sides:
7-x = x^2 - 2x +1
subtracting (7-x) at both sides we have:
0 = x^2 - x - 6 which may be factorized in (x-3)(x+2)
then the roots will be:
x1 = 3
x2 = -2
This was obtained making either one of the factors equal to zero.
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